In 2009 I attended the homage to J.M. Mestres Quadreny at the Auditorium of La Pedrera. I wanted to work on musical randomness, which meant abandoning classical digital animation and writing code to generate visual processes. I chose the 4th movement of Sonades de la calor del foc because of its forcefulness.

The composer uses randomness for the frequencies throughout the three parts of the movement. In the first part, I represented each instrument by constructing a series of rectangles that alter their individual sizes at random; a mechanism capable of indefinitely generating different proportions without repetition. After a bridge, there’s an episode of extreme, dynamic contrasts. Here the animation technique is based on physical behaviours and the cubes move like sparks in a closed-off, turbulent fire. In the long final part there’s a transition towards silence and a return to the initial mass of sound; the silences come in at random until achieving total silence, afterwards symmetrically returning to the beginning.